中能重离子碰撞中晕核反应动力学  

Nuclear reaction dynamics induced by halo-nuclei at intermediate energy heavy ion collisions

作　　者：刘建业[1] 郭文军[2] 邢永忠[1] 李希国[3] 左维[3] 

机构地区：[1]天水师范学院数理信息学院基础物理研究所 [2]南京大学物理系,南京210008 [3]中国科学院近代物理研究所

出　　处：《物理学报》2006年第3期1068-1076,共9页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(批准号:G2000077400);国家自然科学基金重点项目(批准号:10435080;105350101);国家自然科学基金(批准号:10447006;10575075;10125521;10447113);江苏省博士后科研资助计划项目;中国博士后科学基金;中国科学院知识创新工程重要方向项目(批准号:KJCXZ-SW-NO2)资助的课题.~~

摘　　要：基于同位旋相关量子分子动力学研究了中子晕核和质子晕核的核反应动力学,着重研究了松散的晕结构对于重离子碰撞中的碎裂和动量耗散中的特殊作用.为了突出晕核松散结构在反应动力学中的特殊作用.同时计算了在完全相同入射道条件下相等质量稳定弹核引起核反应.通过对晕核和稳定核核反应动力学结果的对比分析,发现晕核的松散结构对核反应动力学的作用和影响是重要的.如这种松散结构明显的增加了碎裂多重性;相反,减小了原子核阻止(动量耗散).We studied systematically the reaction dynamics induced by neutron-halo nuclei and proton-halo nuclei within the isospin dependent quantum molecular dynamics, such as the effects of loose bound halo-nuclei on the fragmentation reaction and momentum dissipation for different colliding systems with different beam energies and different impact parameters. In order to emphasize the roles of neutron-halo nucleus ^19B and proton-halo nucleus 23 Al on the reaction dynamics we also calculated the the reaction dynamics induced by the stable nuclei ^19F and ^23 Na with equal mass under identical incident channel conditions. Based on the comparison of results of reaction dynamics induced by halo-nucleus colliding systems and stable nucleus collidinmg systems we found that the roles of loose bound halo-nucleus structure on the fragmentation multiplicity and nuclear stopping （momentum dissipation） are important for all of colliding systems with different beam energies and minor impact parameters, such as, the loose bound halo-nuclei structure increases the fragmentation multiplicity, but reduces the nuclear stopping.

关 键 词：中子晕核 质子晕核 重离子碰撞 核反应动力学 

分 类 号：O571.6[理学—粒子物理与原子核物理]